diff --git a/terminal/plugins/org.eclipse.tm.terminal.control/META-INF/MANIFEST.MF b/terminal/plugins/org.eclipse.tm.terminal.control/META-INF/MANIFEST.MF
index 73943f780ef..e9749de69dd 100644
--- a/terminal/plugins/org.eclipse.tm.terminal.control/META-INF/MANIFEST.MF
+++ b/terminal/plugins/org.eclipse.tm.terminal.control/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.tm.terminal.control; singleton:=true
-Bundle-Version: 5.0.0.qualifier
+Bundle-Version: 5.0.100.qualifier
 Bundle-Activator: org.eclipse.tm.internal.terminal.control.impl.TerminalPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/terminal/plugins/org.eclipse.tm.terminal.control/about.properties b/terminal/plugins/org.eclipse.tm.terminal.control/about.properties
index e6e6518939a..ad195fd530c 100644
--- a/terminal/plugins/org.eclipse.tm.terminal.control/about.properties
+++ b/terminal/plugins/org.eclipse.tm.terminal.control/about.properties
@@ -1,5 +1,5 @@
 ###############################################################################
-# Copyright (c) 2018, 2020 Contributors to the Eclipse Foundation
+# Copyright (c) 2018, 2021 Contributors to the Eclipse Foundation
 #
 # See the NOTICE file(s) distributed with this work for additional
 # information regarding copyright ownership.
@@ -24,7 +24,7 @@ blurb=TM Terminal Control\n\
 Version: {featureVersion}\n\
 Build id: {0}\n\
 \n\
-Copyright (c) 2018, 2020 Contributors to the Eclipse Foundation
+Copyright (c) 2018, 2021 Contributors to the Eclipse Foundation
 \n\
 See the NOTICE file(s) distributed with this work for additional\n\
 information regarding copyright ownership.\n\
diff --git a/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100Emulator.java b/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100Emulator.java
index 03baff99903..b82f38fd01f 100644
--- a/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100Emulator.java
+++ b/terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100Emulator.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2003, 2018 Wind River Systems, Inc. and others.
+ * Copyright (c) 2003, 2021 Wind River Systems, Inc. and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -403,7 +403,8 @@ public class VT100Emulator implements ControlListener {
 				break;
 
 			case ANSISTATE_EXPECTING_PARAMETER_OR_COMMAND:
-				if (character == '?') {
+				// characters `<=>?` mark private commands
+				if (character >= '\u003c' && character <= '\u003f') {
 					ansiState = ANSISTATE_EXPECTING_DEC_PRIVATE_COMMAND;
 					break;
 				}
@@ -411,8 +412,7 @@ public class VT100Emulator implements ControlListener {
 				// Parameters can appear after the '[' in an escape sequence, but they
 				// are optional.
 
-				if (character == '@' || (character >= 'A' && character <= 'Z')
-						|| (character >= 'a' && character <= 'z')) {
+				if (character >= '\u0040' && character < '\u007f') {
 					ansiState = ANSISTATE_INITIAL;
 					processAnsiCommandCharacter(character);
 				} else {
@@ -435,8 +435,7 @@ public class VT100Emulator implements ControlListener {
 				// Parameters can appear after the '[?' in an escape sequence, but they
 				// are optional.
 
-				if (character == '@' || (character >= 'A' && character <= 'Z')
-						|| (character >= 'a' && character <= 'z')) {
+				if (character >= '\u0040' && character < '\u007f') {
 					ansiState = ANSISTATE_INITIAL;
 					processDecPrivateCommandCharacter(character);
 				} else {